DC Bus Regulation with a Flywheel Energy Storage System PDF Download
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Author: Barbara H. Kenny
Publisher:
ISBN:
Category : Algorithms
Languages : en
Pages :
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Author: Barbara H. Kenny
Publisher:
ISBN:
Category : Algorithms
Languages : en
Pages :
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author:
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ISBN:
Category :
Languages : en
Pages :
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Author:
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ISBN:
Category :
Languages : en
Pages : 14
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Author:
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ISBN:
Category :
Languages : en
Pages : 13
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Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781721525652
Category :
Languages : en
Pages : 30
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Book Description
A computer simulation of a flywheel energy storage single axis attitude control system is described. The simulation models hardware which will be experimentally tested in the future. This hardware consists of two counter rotating flywheels mounted to an air table. The air table allows one axis of rotational motion. An inertia DC bus coordinator is set forth that allows the two control problems, bus regulation and attitude control, to be separated. Simulation results are presented with a previously derived flywheel bus regulator and a simple PID attitude controller. Kascak, Peter E. and Jansen, Ralph H. and Kenny, Barbara and Dever, Timothy P. Glenn Research Center NASA/TM-2002-211812, NAS 1.15:211812, E-13507, IECEC-2002-20078
Author:
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ISBN:
Category :
Languages : en
Pages : 14
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Author: Seth Sanders
Publisher:
ISBN:
Category : Electric power systems
Languages : en
Pages : 26
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Author: Barbara H. Kenny
Publisher: BiblioGov
ISBN: 9781289146450
Category :
Languages : en
Pages : 24
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The NASA Glenn Research Center has been developing technology to enable the use of high speed flywheel energy storage units in future spacecraft for the last several years. An integral part of the flywheel unit is the three phase motor/generator that is used to accelerate and decelerate the flywheel. The motor/generator voltage is supplied from a pulse width modulated (PWM) inverter operating from a fixed DC voltage supply. The motor current is regulated through a closed loop current control that commands the necessary voltage from the inverter to achieve the desired current. The current regulation loop is the innermost control loop of the overall flywheel system and, as a result, must be fast and accurate over the entire operating speed range (20,000 to 60,000 rpm) of the flywheel. The voltage applied to the motor is a high frequency PWM version of the DC bus voltage that results in the commanded fundamental value plus higher order harmonics. Most of the harmonic content is at the switching frequency and above. The higher order harmonics cause a rapid change in voltage to be applied to the motor that can result in large voltage stresses across the motor windings. In addition, the high frequency content in the motor causes sensor noise in the magnetic bearings that leads to disturbances for the bearing control. To alleviate these problems, a filter is used to present a more sinusoidal voltage to the motor/generator. However, the filter adds additional dynamics and phase lag to the motor system that can interfere with the performance of the current regulator. This paper will discuss the tuning methodology and results for the motor/generator current regulator and the impact of the filter on the control. Results at speeds up to 50,000 rpm are presented.
Author: William M. Brobeck & Associates
Publisher:
ISBN:
Category : Energy storage
Languages : en
Pages : 112
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